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Sky Ridge railroad cut, Hawleyville, Newtown, Fairfield County, Connecticut, USAi
Regional Level Types
Sky Ridge railroad cut- not defined -
Hawleyville- not defined -
Newtown- not defined -
Fairfield CountyCounty
ConnecticutState
USACountry

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Key
Latitude & Longitude (WGS84):
41° 25' 35'' North , 73° 21' 36'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Newtown1,967 (2017)4.9km
Bethel9,549 (2017)7.6km
Danbury84,657 (2017)8.6km
New Fairfield14,126 (2017)11.4km
Heritage Village3,736 (2017)12.1km


A prominent railroad cut on the New York and New England Railroad line through Sky Ridge near Hawleyville (Lapham, 1957) where "pegmatites" of clinochlore and epidote with orthoclase, albite and quartz bordered by muscovite are embedded in diorite. An alteration zone of pink orthoclase surrounds the pegmatites. Pectolite, stilbite and apophyllite formed in fractures.

Note: This is an active railroad line.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


22 valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Habit: massive
Colour: white to very pale green
Description: fine to coarse grained
Reference: Former Ronald Januzzi collection
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Habit: fibrous
Colour: very pale green
Reference: Former Ronald Januzzi collection
'Amphibole Supergroup var: Byssolite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Habit: fibrous
Colour: very pale green
Reference: Former Ronald Januzzi collection
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Lapham (1957): Epidote From Hawleyville
'Apophyllite'
Habit: prismatic with pinacoid terminations
Colour: white
Description: Small crystals with pectolite and stilbite in fractures in the gneiss.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Ronald Januzzi collection.
Calcite ?
Formula: CaCO3
Description: Reference provides no details
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Chalcopyrite ?
Formula: CuFeS2
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Habit: compact granular masses
Colour: dark green
Description: found in a clinochlore-apatite-orthoclase pegmatite along nearly horizontal fracture planes of a medium to coarse-grained diorite, it reportedly contains a small amount of Mn. Referred to in these old references as "prochlorite".
Reference: Lapham (1957): Epidote From Hawleyville; Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Agar and Emendorfer (1937): Manganiferous Prochlorite from Hawleyville, Conn. AJS, 34 77-80.;
Copiapite ?
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Description: Reference provides no details and also questions its presence.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Habit: radiating, elongated, striated prisms
Colour: colorless, straw-yellow, brownish yellow, yellowish green, pistachio green
Description: found in a clinochlore-apatite-orthoclase pegmatite along nearly horizontal fracture planes of a medium to coarse-grained diorite, crystals reach to at least 10 cm
Reference: Rocks & Minerals (1995) 70:396-409; Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Lapham (1957): Epidote from Hawleyville, Connecticut;
Fluorapatite
Formula: Ca5(PO4)3F
Habit: short hexagonal prisms
Colour: pale green
Fluorescence: yellow
Description: At least one specimen formerly in the Januzzi collection has a group of parallel crystals 17mm long.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Former Ronald Januzzi collection.
Galena ?
Formula: PbS
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
'Garnet Group'
Formula: X3Z2(SiO4)3
Colour: red
Description: Tiny subhedral crystals in albite matrix.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Gypsum ?
Formula: CaSO4 · 2H2O
Description: Reference provides no details. Could be an alteration product of pyrite.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Heulandite-Ca ?
Formula: (Ca,Na)5(Si27Al9)O72 · 26H2O
Description: Reference provides only a list of minerals with no details.
Reference: Januzzi, Ronald. (1976), Mineral Localities of Connecticut and Southeastern New York State. Mineralogical Press, Danbury, Connecticut.
Melanterite ?
Formula: Fe2+(H2O)6SO4 · H2O
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Habit: compact books
Colour: brown to greenish
Description: found along the simple feldspar-quartz pegmatite borders
Reference: Lapham (1957): Epidote From Hawleyville
Natrolite ?
Formula: Na2Al2Si3O10 · 2H2O
Description: Reference provides no details, could be confused with pectolite.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Opal ?
Formula: SiO2 · nH2O
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Opal var: Opal-AN ?
Formula: SiO2 · nH2O
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Orthoclase
Formula: K(AlSi3O8)
Colour: pink
Description: in the transition zone bordering the epidote-clinochlore pegmatite, color reportedly due to tiny hematite inclusions
Reference: Lapham (1957): Epidote From Hawleyville
Pectolite
Formula: NaCa2Si3O8(OH)
Habit: acicular
Colour: white
Description: Radiating aggregates in fractures in gneiss.
Reference: Ronald Januzzi collection
Pyrite ?
Formula: FeS2
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
'Pyroxene Group' ?
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Pyrrhotite ?
Formula: Fe7S8
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
Quartz
Formula: SiO2
Description: massive in the pegmatites, "and a few, elongated milky quartz crystals" in a clinochlore matrix (Lapham 1956)
Reference: Lapham (1957): Epidote From Hawleyville; Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State;
Rutile
Formula: TiO2
Habit: twinned, reticulated, plates
Colour: gray to brown
Description: Thin plates made up of a 2-D reticulated, twinned, elongated prisms. Plates typically a few cm across.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Former Ronald Januzzi collection.
Staurolite ?
Formula: Fe2+2Al9Si4O23(OH)
Description: Reference provides no details.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State
'Stilbite subgroup'
Habit: radiating, flat prisms with pinacoidal terminations
Colour: white, colorless
Description: Thin coatings of radiating crystals formed along many of the vertical fractures. Micro crystals with pectolite and apophyllite in fractures in the gneiss.
Reference: Rocks & Minerals (1995) 70:396-409; Lapham (1957): Epidote from Hawleyville; Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Ronald Januzzi collection.
Titanite
Formula: CaTi(SiO4)O
Colour: pale brown
Description: Micro crystals in albite matrix.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Former Ronald Januzzi collection.
Zoisite
Formula: Ca2Al3[Si2O7][SiO4]O(OH)
Description: Listed by Januzzi (1976) as questionable. Lapham (1957) determined the epidote group minerals found here are all epidote.
Reference: Januzzi (1976): Mineral Localities of Connecticut and Southeastern New York State; Lapham (1957): Epidote from Hawleyville

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite ?2.CB.10aCuFeS2
Galena ?2.CD.10PbS
Pyrite ?2.EB.05aFeS2
Pyrrhotite ?2.CC.10Fe7S8
Group 4 - Oxides and Hydroxides
Opal ?4.DA.10SiO2 · nH2O
var: Opal-AN ?4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Calcite ?5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Copiapite ?7.DB.35Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Gypsum ?7.CD.40CaSO4 · 2H2O
Melanterite ?7.CB.35Fe2+(H2O)6SO4 · H2O
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Heulandite-Ca ?9.GE.05(Ca,Na)5(Si27Al9)O72 · 26H2O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Natrolite ?9.GA.05Na2Al2Si3O10 · 2H2O
Orthoclase9.FA.30K(AlSi3O8)
Pectolite9.DG.05NaCa2Si3O8(OH)
Staurolite ?9.AF.30Fe2+2Al9Si4O23(OH)
Titanite9.AG.15CaTi(SiO4)O
Zoisite ?9.BG.10Ca2Al3[Si2O7][SiO4]O(OH)
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Apophyllite'-
'Garnet Group'-X3Z2(SiO4)3
'Pyroxene Group' ?-
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena ?2.8.1.1PbS
Pyrrhotite ?2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 1:1
Chalcopyrite ?2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite ?2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Rutile4.4.1.1TiO2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite ?14.1.1.1CaCO3
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum ?29.6.3.1CaSO4 · 2H2O
Melanterite ?29.6.10.1Fe2+(H2O)6SO4 · H2O
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
Miscellaneous
Copiapite ?31.10.5.1Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Staurolite ?52.2.3.1Fe2+2Al9Si4O23(OH)
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Zoisite ?58.2.1b.1Ca2Al3[Si2O7][SiO4]O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=3
Pectolite65.2.1.4aNaCa2Si3O8(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal ?75.2.1.1SiO2 · nH2O
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Heulandite-Ca ?77.1.4.1(Ca,Na)5(Si27Al9)O72 · 26H2O
Natrolite ?77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Apophyllite'-
'Garnet Group'-X3Z2(SiO4)3
Opal
var: Opal-AN ?
-SiO2 · nH2O
'Pyroxene Group' ?-
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H ClinochloreMg5Al(AlSi3O10)(OH)8
H ApatiteCa5(PO4)3(Cl/F/OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H PectoliteNaCa2Si3O8(OH)
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
H GypsumCaSO4 · 2H2O
H Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
H Opal (var: Opal-AN)SiO2 · nH2O
H MelanteriteFe2+(H2O)6SO4 · H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H StauroliteFe22+Al9Si4O23(OH)
H OpalSiO2 · nH2O
H ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
CCarbon
C CalciteCaCO3
OOxygen
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O ClinochloreMg5Al(AlSi3O10)(OH)8
O ApatiteCa5(PO4)3(Cl/F/OH)
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O FluorapatiteCa5(PO4)3F
O RutileTiO2
O TitaniteCaTi(SiO4)O
O Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O PectoliteNaCa2Si3O8(OH)
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O Garnet GroupX3Z2(SiO4)3
O AlbiteNa(AlSi3O8)
O CalciteCaCO3
O CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
O GypsumCaSO4 · 2H2O
O Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
O Opal (var: Opal-AN)SiO2 · nH2O
O MelanteriteFe2+(H2O)6SO4 · H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O StauroliteFe22+Al9Si4O23(OH)
O OpalSiO2 · nH2O
O ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
F FluorapatiteCa5(PO4)3F
F Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
NaSodium
Na PectoliteNaCa2Si3O8(OH)
Na AlbiteNa(AlSi3O8)
Na Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
MgMagnesium
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al OrthoclaseK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al AlbiteNa(AlSi3O8)
Al Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al StauroliteFe22+Al9Si4O23(OH)
Al ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
SiSilicon
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si TitaniteCaTi(SiO4)O
Si Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si PectoliteNaCa2Si3O8(OH)
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Garnet GroupX3Z2(SiO4)3
Si AlbiteNa(AlSi3O8)
Si Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Si Opal (var: Opal-AN)SiO2 · nH2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si StauroliteFe22+Al9Si4O23(OH)
Si OpalSiO2 · nH2O
Si ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
P FluorapatiteCa5(PO4)3F
SSulfur
S ChalcopyriteCuFeS2
S CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
S GalenaPbS
S GypsumCaSO4 · 2H2O
S MelanteriteFe2+(H2O)6SO4 · H2O
S PyrrhotiteFe7S8
S PyriteFeS2
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
Cl Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K OrthoclaseK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca FluorapatiteCa5(PO4)3F
Ca TitaniteCaTi(SiO4)O
Ca PectoliteNaCa2Si3O8(OH)
Ca CalciteCaCO3
Ca GypsumCaSO4 · 2H2O
Ca Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Ca ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
TiTitanium
Ti RutileTiO2
Ti TitaniteCaTi(SiO4)O
Ti Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe ChalcopyriteCuFeS2
Fe CopiapiteFe2+Fe43+(SO4)6(OH)2 · 20H2O
Fe MelanteriteFe2+(H2O)6SO4 · H2O
Fe PyrrhotiteFe7S8
Fe PyriteFeS2
Fe StauroliteFe22+Al9Si4O23(OH)
CuCopper
Cu ChalcopyriteCuFeS2
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Agar, William M. and Earl Emendorfer. (1937): Manganiferous Prochlorite from Hawleyville, Conn., American Journal of Science, 34, pp. 77-80.
Lapham, Davis M. (1957): Epidote from Hawleyville, Connecticut. American Mineralogist. Vol. 42, No. 1-2, pp. 62-72.
Januzzi, Ronald. E. (1976): The Mineral Localities of Connecticut and Southeastern New York State. Mineralogical Press, Danbury, Connecticut.
Januzzi, Ronald. E. (1994): Mineral Data Book - Western Connecticut and Environs. Mineralogical Press, Danbury, Connecticut.
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, pp. 397.

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